cmake_minimum_required(VERSION 3.10.0...3.22)

# Set up testing
enable_testing()

project(polyscope-tests)

### Configure output locations
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

### Configure the compiler

# NOTE: Polyscope itself uses C++11, but the tests use C++17 because googletest requires it.

if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")

  # using Clang (linux or apple) or GCC
  message("Using clang/gcc compiler flags")
  SET(BASE_CXX_FLAGS "-std=c++17 -Wall -Wextra -g3") # use C++17 for tests only
  SET(DISABLED_WARNINGS " -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-deprecated-declarations -Wno-missing-braces -Wno-unused-private-field")
  SET(TRACE_INCLUDES " -H -Wno-error=unused-command-line-argument")

  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    message("Setting clang-specific options")
    SET(BASE_CXX_FLAGS "${BASE_CXX_FLAGS} -ferror-limit=3 -fcolor-diagnostics")
    SET(CMAKE_CXX_FLAGS_DEBUG          "-fsanitize=address -fno-limit-debug-info")
  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
    message("Setting gcc-specific options")
    SET(BASE_CXX_FLAGS "${BASE_CXX_FLAGS} -fmax-errors=5")
    SET(DISABLED_WARNINGS "${DISABLED_WARNINGS} -Wno-maybe-uninitialized -Wno-format-zero-length -Wno-unused-but-set-parameter -Wno-unused-but-set-variable")
    SET(CMAKE_CXX_FLAGS_DEBUG          "-fsanitize=address")
  endif()
  
  SET(CMAKE_CXX_FLAGS "${BASE_CXX_FLAGS} ${DISABLED_WARNINGS}")
  SET(CMAKE_CXX_FLAGS_DEBUG          "${CMAKE_CXX_FLAGS_DEBUG} -g3")
  include(CheckCXXCompilerFlag)
  CHECK_CXX_COMPILER_FLAG(-march=native  COMPILER_SUPPORTS_MARCH_NATIVE)
  if(COMPILER_SUPPORTS_MARCH_NATIVE)
    set(MARCH_NATIVE "-march=native")
  else()
    set(MARCH_NATIVE "")
  endif()
  SET(CMAKE_CXX_FLAGS_RELEASE        "${MARCH_NATIVE} -O3 -DNDEBUG")

elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
  # using Visual Studio C++
  message("Using Visual Studio compiler flags")
  set(BASE_CXX_FLAGS "${BASE_CXX_FLAGS} /W4")
  set(BASE_CXX_FLAGS "${BASE_CXX_FLAGS} /MP") # parallel build
  SET(DISABLED_WARNINGS "${DISABLED_WARNINGS} /wd\"4267\"")  # ignore conversion to smaller type (fires more aggressively than the gcc version, which is annoying)
  SET(DISABLED_WARNINGS "${DISABLED_WARNINGS} /wd\"4244\"")  # ignore conversion to smaller type (fires more aggressively than the gcc version, which is annoying)
  SET(DISABLED_WARNINGS "${DISABLED_WARNINGS} /wd\"4305\"")  # ignore truncation on initialization
  SET(CMAKE_CXX_FLAGS "${BASE_CXX_FLAGS} ${DISABLED_WARNINGS}")
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MD")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MDd")

  add_definitions(/D "_CRT_SECURE_NO_WARNINGS")
  add_definitions (-DNOMINMAX)
else()
  # unrecognized
  message( FATAL_ERROR "Unrecognized compiler [${CMAKE_CXX_COMPILER_ID}]" )
endif()



### Download and unpack googletest at configure time
# (from the googletest docs)
configure_file(CMakeLists.txt.in googletest-download/CMakeLists.txt)
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
  RESULT_VARIABLE result
  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
if(result)
  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
endif()
execute_process(COMMAND ${CMAKE_COMMAND} --build .
  RESULT_VARIABLE result
  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
if(result)
  message(FATAL_ERROR "Build step for googletest failed: ${result}")
endif()

# Prevent overriding the parent project's compiler/linker
# settings on Windows
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

# Add googletest directly to our build. This defines
# the gtest and gtest_main targets.
add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
                 ${CMAKE_CURRENT_BINARY_DIR}/googletest-build
                 EXCLUDE_FROM_ALL)

set_property(TARGET gtest PROPERTY CXX_STANDARD 11)


# Build the tests
set(TEST_SRCS 
  src/main_test.cpp
  src/array_adaptors_test.cpp
  src/basics_test.cpp
  src/point_cloud_test.cpp
  src/curve_network_test.cpp
  src/surface_mesh_test.cpp
  src/volume_mesh_test.cpp
  src/volume_grid_test.cpp
  src/sparse_volume_grid_test.cpp
  src/camera_view_test.cpp
  src/group_test.cpp
  src/floating_test.cpp
  src/combo_test.cpp
  src/misc_test.cpp
  src/interop_and_serialization_test.cpp
)

add_executable(polyscope-test "${TEST_SRCS}")
target_include_directories(polyscope-test PUBLIC "${gtest_SOURCE_DIR}/include")
target_include_directories(polyscope-test PRIVATE "include/")
target_link_libraries(polyscope-test gtest_main polyscope)

# Add polyscope as a subproject
add_subdirectory(../ "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}")

# Catch the usage of obsolete functions in imgui
target_compile_definitions(imgui PUBLIC IMGUI_DISABLE_OBSOLETE_FUNCTIONS)
